i dont think there is any reason he should have a new armor unless it makes sense for the story. honestly i hope they use the hulk buster armor for the beginning of the avengers. they have to make sense of how bruce is brought on to the team. i dont want that to be an off screen thing. iron man and captain america along with black widow and hawkeye are going to already be part of the team basically, but thor will be the main reason for the story in the avengers and hulk should be used as the intro. past that, i would love to see a really cool underwater outfit for tony in iron man 3 ONLY if it makes sense. i would prefer it not to be just a one-time usage tho